There was a Cute Girl in the Hero’s Party, so I Tried Confessing to Her

Synopsis

After dying in a traffic accident, Youki is reborn in a fantasy world, not as a legendary hero or as the Demon King, but as a demon serving under the Demon King. Despite being extremely powerful, he has no ambition to rule and is content to stay in the Demon King's castle in a middling role as one of its guardians, tasked with stopping the hero's party. When the heroes finally storm the castle, Youki overwhelms the entire group with ease. Then he notices Cecilia, the party's priestess, and falls for her at first sight. He finds everything about her adorable, from her earnest expression to her smallest gestures, and resolves to confess his feelings even if it means turning against the Demon King. The series is a pure and slightly chuunibyou-flavored romantic comedy fantasy about a human and a demon.